Device for sharpening the rotary circular knives of meat-slicing machines.



W. A. VAN BERKEL.

DEVICE FOR SHARPENING'THB ROTARY CIRCULAR KNIVES 0F MEATSLIGINGMACHINES.

APPLIOATION FILED JULY 24, 1912,

L57$97u Patented Apr.1,1913.

z SHEETS-SHEET 1.

ZmBBr/Ed I W. A. VAN BERKEL.

DEVICE FOR SHARPENING THE ROTARY CIRCULAR KNIVES 0F MEAT SLICINGMAOHINES.

APPLICATION FILED JULY 24, 1912.

1,057,597 Patented. Apr.1,1913.

2 SHEETS-$11331 2.

.ance with the principles UNITED sraaras Parana caries.

WILHELMUS A. VAN BERKEL, OF ROTTERDAM, NETHERLANDS, ASSIGNOR TO U.SLICING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OFILLINOIS.

DEVICEIOB, SHARPENING THE ROTARY CIRCULAR KNIVES OF MEAT-SLICINGMACHINES.

Specification of Letters Patent.

Patented Apr. 1, rare.

Application filed July 24, 1912. Serial No. 711,327.

To all whom it may concern:

Be it-known that I, lVILIIELMUs A. VAN BERKEL, a subject of the Ruler ofthe Netherlands, residing at Rotterdam, Netherlands, have inventedcertain new and useful'Improvements in Devices for Sharpening the RotaryCircular Knives of Meat-Slicing Machines, of which the following is aspecification.

This invention relates to improvements in devices for sharpening therotary circular knives of meat slicing machines, and has for its primaryobject to provide an improved, simple and efficient device of this classhaving a sharpener for each face of the knife and provided with meanswhereby the sharpeners may be individually and readily positioned withrespect to the knife and being also provided with means whereby one. ofthe sharpeners may be readily raised to clear the knife when not inoperation and as readily projected overthe knife and lowered withrespect-to the knife when being positioned for use.

To the attainment of these ends and the accomplishment of other new anduseful objects, as will appear, the invention consists in the featuresof novelty in substantially the construction, combination andarrangement of the several parts hereinafter more fully described andclaimed and shown in the accompanying drawings, illustrating theinvention, and in which:

Figure 1 is a side elevation of an improved device of this classconstructed in accordof this invention. Fig. 2 is a top plan view of theparts shown in Fig. 1. Fig. 3 is a sectional view on line 3-3, Fig. 2.Fig. 4 is a detail sectional view on line 4-4, Fig. 2. Fig. 5 is a frontelevation of the parts shown in Fig. 1.

Referring more particularly to the draw ings, and in the presentexemplification of this invention, the numeral 10 designates enerally asupport having a stem 11 upon which the sharpeners, to be hereinafterdescribed, are mounted. The stem 11 has an adjustable engagement. withthe bracket 12 and a depending screw threaded portion 1.3 is connectedwith the support 10 and engages an arm 14 on the bracket, preferably bypassing therethrough, and lock-nuts 15 have threaded engagement with theportion 13 on opposite sides of the arm 14 for holding the support 10 inits adjusted position.

Mounted upon the support 10 is a casing 16 which isprovided preferablywith a projecting portion 17 extending therefrom and which portionprojects between two cars 18 to be connected therewith by means of a pin19 passing through the ears and the said portion. A lock screw 20 passesthrough one of the ears and engages the portion 17 to hold the casing 16at the proper angle of inclination. Slidably mounted in the casing 16 isa bearing sleeve 21 having ball races 22 and a spindle 23 passes throughthe sleeve and is provided with hearing portions 2 25, cooperating withthe ball races, and the hearing portion 24 is preferably removablysecured to the spindle 23 by being threaded on to the portion 26 thereofand a lock-nut 27 is provided for holding the portion Qtt againstdisplacement. The balls 28 are arranged in the races 22 and haveengagement with the bearing portions 24, This sleeve 21 is held againstrotation in the casing 16, preferably by means of a screw or fasteningdevice 29 passing through the casing and into a slot 30 in the bearingsleeve 21. The slot is of some length so as to permit the sleeve to bemoved longitudinally in the casing, for a purpose to be set forth. Theforward end of the spindle 23 projects beyond the sleeve and the casingand is provided with a shoulder 31 against which the grinding wheel 32rests and which wheel is provided with an aperture to receive the end 33of the spindle. This end 33 is preferably threaded and a nut or collar34 is screwed thereon so as to hold the grinder 23 between the shoulder21 and a washer 35 disposed between the grinder and a nut 3i. Thegrinding wheel is preferably in the form of a disk having a laterallyprojecting annular rim, the outer face of which rim terminates in a flatsurface. This grinding wheel or disk is preferably angularly disposed toa horizontal plane all of which is shown in Figs. 3 and 5 of thedrawing. IVhen the grinding wheel is thus secured to the spindle and ismoved into contact with the bevel face of the moving knife 36, thegrinder, as well as the spindle 23, will be rotated. The casing 16 isof. a length somewhat greater than the length of the sleeve 21 andarranged in the casing at the end opposite to the endat which thegrinder 32 is located, is an elastic member 36 in the form of a coilspring which surrounds'an extension 37 on the spindle 23, one end of theelastic member engaging the end of the sleeve and the other end engagingthe end of threaded sleeve 38. This latter sleeve is provided with ahand operating wheel 39 which is of a size somewhat greaterthan thediameter of the casing while the sleeve portion 38 is of a size to .bymeans of a collar 40 engaging the end of the spindle 37 and a pin 41passing through the collar and spindle. With this construction, thespindle -23 and the extension 37 thereof .rotate freely with relation tothesleeve 38 and hand wheel 39. The elastic member 36 tends normally tomove the grinder 42 into engagement with the bevelface of the knife whenthe sleeve 21 is adjusted forwardly in the casing 16. Assuming the partsto be in the position shown in Fig. 3, the grinder 32 will be inengagement with the bevel face of the knife. When it is desired to movethe grinder out of engagement with the knife, all that is necessary isto rotate the hand wheel 39, which will tend e to unscrew the sleeve 38with respect to the casing 16. Inasmuch as the sleeve 33 and the handwheel 39 are connected with the extension 37 of the spindle, through themedium of the collar 40 and the pin 41, and as the sleeve and hand wheelare loose with respect to the extension of the spindle, it will bemanifest that when the sleeve is unscrewed, the sleeve 21, together withthe grinder 32, will be drawn backwardly .or away from the'bevel face ofthe knife. Obviously, the reverse operation will move the grinder towardthe knife.

, Aflcasing 42, similar to the casing 16, is

I pivotally mounted as at 43 upon the support 10 and arranged in thiscasing 42 is a sleeve 44 having ball races 45 for the reception of theballs 46, and a spindle 47 having bearing portions 48, 49 passes throughthe sleeve 44 so that the balls 46 will engage the respective bearingportions 48, 49. The bearing 49 is preferably threaded upon the spindle27 and a lock-nut 50 is provided for looking it against accidentaldisplacement. The forward end of the spindle 47 projects beyondtheforward end of the casing 42 jeoeasov and is preferably enlarged incross section as at 51 and has a shoulder 52 against which the grinder53 rests, and a lock-nut 54 is threaded on to the extremity 55 of thespindle for removably securing the grinder on' the grinding of the bevelface. An elasticmember 57 is arranged in the casing 42 and surrounds theportion 51 of the spindle. One end of the elastic member engages the endof the sleeve 44 at the forward end of the casing and the other end ofthe elastic member engages a shoulder 58 formed on the casing 42, sothat the normal tendency of the elastic member is to retract the grinder53 or move it to the left, in Figs. 1. 2 and 3, into engagement with theface of the knife opposite to the face which is engaged by the grinder32. This casing 42 together with the grinder 53 is adapted to beoscillated about the pivot 43 and for that purpose there is provided anelastic member 59 which is disposed between the casing 42 and thesupport 10 and is arranged in such a position with respect to the pivot43 that it tends normally to raise the casing 42 about its pivot andthereby tend to elevate the grinder 53 above the knife 36. An operatinglever 60 having a bifurcated portion 61 which stands astride of thecasing 42 is pivotally connected as at 62 to'a portion of the support10. A cam face 63 is provided on the casing 42 so as to project upwardlytherefrom. This cam face 63 is provided with a stop 64 at one end and astop 65 at its other end and the face is of such a size that when thelever 60 -.is rocked about its point of pivotal support, the end face ofthe bifurcated port-ion rides-over the cam face 63 according to thedirection of oscillation of the lever and the elastic member 59 willhold the cam face in engagement with such cated portion movesover thecam face 63.

from the position shown in dotted lines in Fig. 1 to the position shownin full lines in said figure and also in Fig. 4, the casing '42 will bedepressed or moved about its pointof pivotal support 43 against thestress of the elastic member 59 and the casing will be forceddownwardly, and is limited in this downward movement by its engagementwith an adjustable stop 66 on the support 10. The lever 60 cooperatingwith thesho-ulders 64, 65 and the cam face 63tends to lock or hold thecasing in either of its adjusted positions. It will, therefore, bemanifest that by the oscillation of the lever 60 the grinder 53 may beraised or lowered with respect to the edge of the knife 36 so as to passover the edge. In order, there-- fore, to prevent the -grinder fromstriking the edge during its movement thereover, means are provided forholding the grinder 53 against lateral movement under the stress of theelastic member 57 during the adjustment of the casing 42 and the grinder53 about the pivot 43. Any suitable means may be provided for thispurpose, but 1 simple and efficient means will now be described.

An upright 67 is provided on the support 10 adjacent the casing 42 andthis upright is provided with a cam face 68 and a face 69. Connectedwith the sleeve 45 in the casing 42 in any suitable manner, is a pin 70which extends through a slot 71 in the casing and this pin 70 engagesand moves over the faces 68, 69 of the upright 67. The face 68 isinclined, as shown, and is so arranged that during the latter portion ofthe movement of the casing 42 about the pivot 43, the pin 70 will ridethereover. This movement occurs at substantially the end of the movementof the casing in an upward direction about its pivot, or at the timewhen the parts assume the position shown in dotted lines in Fig. 1.This, as

' will be seen from said figure, will cause the grinder to be elevatedabove the edge of the knife 36. lVhen the handle 60 is moved in theopposite direction, the pin 70 will travel over the face 68 as thecasing 42 and grinder 53 are being lowered, and serves to hold thegrinder 53 forwardly and against lateral movement under the stress ofthe elastic member 57. The grinder will hold this relative position withrespect to the knife 36 and the casing 42 until the grinder has passedover the edge of the knife to the other side of the knife or to the sideopposite to the side having the bevel. After the grinder has cleared theedge of the knife during the lowering movement of the easing 42, the pin70 will ride off of the face 68 of the upright- 67 and onto the face 69.

' As the pin passes off of the face 68, the

elastic member 57 will exert its stress upon the sleeve 44 so as to movethe grinder 53 laterally into contact with the respective face of theknife. By the time the casing 42 engages the stop 66, the base of thebifurcated portion. of the lever 60 will engage the stop 64 of. the camface 63 and the parts will be held in their adjusted positions. Thegrinders are rotated by their contact with the rotary knife. When thelever 60 1s moved from the full line position shown in Fig. 1 to thedotted line position, the elastic member 59 tends to raise the casing 42about its pivot 43. At the same time the pin 70 will ride over the face69 of the upright which is slightly inclined in a directlon to cause thegrinder 53 -to be shifted laterally in a direction away from the face ofthe knife and this movement will continue during the upward movement ofthe casing 42 until the pin engages the face 68 of the upright. Thus, itwill be seen that the grinder is moved clear of the knife so as to bepermitted to pass over the top edge of the knife without striking theedge, during the raising movement of the casing 42.

Obviously, the entire structure sup-ported by the support 10, togetherwith the support 10, may be raised and lowered vertically with'respectto the knife 36 by adjusting the nuts 15.

While I have'shown and described the preferred 'form of this invention,it is to be understood that many changes may be made in the details ofconstruction and the arrangement of the parts within the scope of theclaims, without departing from the spiritof the invention.

What I claim as new is:

1. In a device of the class described, the combination of a sharpenerfor the back of the knife, a sharpener for the front of the knife, meanstending normally to move the sharpeners laterally and toward therespective faces of the knife, and means for shifting one of thesharpeners over the knife. I

2. In a device of the class described, the combination of a sharpenerfor the back of the knife, a sharpener for the front of theknife, meanstending normally to move the sharpeners laterally and toward therespective faces of the knife, means for shifting one of the sharpenersover the knife, and means for moving the grinder laterally and away fromthe knife during a portion of such shifting movement.

3. In a device of the class described, the

combination of a sharpener for the back of the knife, a sharpener forthe front of the knife, yielding means individual to the sharpeners andtending normally to move the sharpeners laterally toward the respectivefaces of the knife, and means for swinging one of the sharpeners overthe knife and from one side to the other side thereof.

4. The combination of a sharpener for the back of a knife, a sharpenercooperating therewith to operate against the front of said knife, saidsharpeners movable to and from the knife, means individual to saidsharpeners for controlling such movement, and means cooperating with onesharpener and the controlling means therefor, for shifting saidsharpener in both directions over the edge of the knife.

5. In a device of the class. described, thecombination of a mainsupport, a shiftable support carried thereby, a grinder for one mentwith the knife face, and the movement of the shiftable support in theopposite db rection will move the grinder laterally away i from the saidface of the knife.

6. In a device of the class described, the} combination of a mainsupport, a shiftable support carried thereby, a grinder forone: face ofthe knife carried by the shiftable support, said shiftable supportoperating to move the grinder across the edge of the knife, meanswhereby the movement of the, shiftable support in one direction willmove; the grinder laterally and into engagement;

with the knife face, and the movement of the shiftable support in theopposite direction will move the grinder laterally away eombination of amain support, a rocking shiftable support at will.

7. In a device of the class described, the

from the said face of the knife, and means for -controlling the movementof the sand.

1 grinder to be shifted laterally away from combination of amainsupport, a rocking;

support thereon, a grinder for one face of" the knife, and means wherebythe rockingj movement of the support in one direct-lon will move thegrinder across the edge of; the knife inone direction and cause thegrinder to be shifted laterally toward the; face of the knife, and themovement of the rocking support in the opposite direction will move thegrinder laterally away from' the face of the knife and move it acrossthe edge of the knife in the opposite direction.

knife, means whereby the rocking movement of the support in onedirection will move the grinder across the edge of the knife in onedirection and cause the grinder to be shifted laterally toward the faceof the knife, and the movement of the rocking sup .port in the oppositedirection will move thev grinder laterally away from the face of theknife and move it across. the edge of the knife in the oppositedirection, and means for controlling the movements of the said rockingsupport.

- 9, a device of the class described, the

support thereon, a grinder for one face of the knife, means whereby therocking movement of the support in one direction will -move the grinderacross the edge of the ,lflllffi in one direction and cause the grinderto be shifted laterally toward the face of the knife, and the movementof the rocking support in the opposite direction will.

7 Learner move the grinder laterally away from the face of the knife andmove it acrossthe edge of the knife in the opposite direction, and acausing the grinder to be shifted laterally toward the face of the knifeduring a portion of the first recited movement and for causing-thegrinder to be shifted laterally away from the face of the knife duringanother portion of the said movement.

11. In a device for sharpening the knife of a slicing machine, thecombination of a rotary sharpener, means for moving the sharpener intoand out of sharpening position with respect to the knife and across theedge of the knife, and means for causing the I grinder tov be shiftedlaterally toward the face of the knifeduring a portion of the vfirstrecited movement, and for causing the the face of the knife duringanother portion of the said movement, the last recited means embodyingan elastic element operating en the sharpener.

' 12. In a device for sharpening the knife of a slicing machine, thecombination of a ioo 13. In a device for sharpening the knife of aslicing machine, the combination of a rotary sharpener for one side ofthe knife, means for causing the sharpener to be moved laterally intoand out of engagement with that side of the knife, a sharpener for theother side of the knife, means for moving the second recited sharpeneracross the edge of the knife into and out of sharpening position withrelation to its respective side of the knife, and-means for causing thelast said sharpener to be moved laterally into and out of contact withthe face of the knife. 14.111 a device for sharpening the knife]- ofa'slicingmachine, the combination of a sharpener for one side of theknife, means forcausing the sharpener to be moved later- .allyinto andout of engagement with that sidefof the knife, a sharpener for the otherside of the knife, means embodying a cam device for moving the secondrecited sharpener across the edge of the knife into and out ofsharpening position with relation to its respective side of the knife,and means for causing the last said'sharpener to be moved laterally intoand out of contact with the face of the knife.

15. In a device for sharpening the knife of a slicing machine, theombination of a sharpener for one side of the knife, yielding meansacting on said sharpener, means for causing the sharpener to be movedlaterally into and out of contact with the knife, a second sharpener forthe other face of the knife and independent of the first recitedsharpener, yielding means acting on the sharpener, means for shiftingthe latter across the edge of the knife and into and out of operatingposition, and cam means for controlling the actionof the last saidyielding means, said cam means operating to cause the sharpener to bemoved laterally away from the face of the knife during one portion ofthe said shifting movement and to be moved laterally toward the face ofthe knife during another portion of the shifting movement.

16. In a device for sharpening the knife of a slicing machine, thecombination of a sharpener for one side of the knife, yielding meansacting on said sharpener, means for causing the sharpener to be movedlaterally into and out of contact with the knife, a second sharpener forthe other face of the knife and independent of the first recite-dsharpener, yielding means acting on the sharpener, means for shiftingthe latter across the edge of the knife and into and out of operatingposition, cam means for controlling the action of the last said yieldingmeans, said cam means operating to cause the sharpener to be movedlaterally away from the face of the knife during one portion of the saidshifting movement and to be moved laterally toward the face of the knifeduring another portion of the shifting movement, and stop devices forlimiting the degree of such shifting movement.

17 In a device of the class described, the combination of a sharpener, abearing for the sharpener, a movably mounted support for the bearing andwith relation to which the bearing is shiftable for laterally adjustingthe sharpener, means for moving the support to shift the sharpeneracross the edge of the knife, and means whereby a portion of themovement of the support in one direction will shift the sharpenerlaterally away from the face of the knife and another portion of themovement of the support will shift the sharpener laterally toward theface of the knife.

18. In a device of the class described, the combination of a sharpener,a bearing for the sharpener, a movably mounted support for the bearingand with relation to which the bearing is shiftable for laterallyadjusting the sharpener, means for moving the support to shift thesharpener across the edge of the knife, and a cam device whereby aportion of the movement of the support in one direction will shift thesharpener laterally away from the face of the knife and another portionof the movement of the support will shift the sharpener-laterally towardthe face of the knife.

19. In a device of the class described, the combination of 'a sharpener,a bearing for the sharpener, a movably mounted support for the bearingand with relation to which the bearing is shiftable for laterallyadjusting the sharpener, a cam device for moving the support to shiftthe sharpener across the edge of the knife, and means whereby a portionof the movement of the support in one direction will shift the sharpenerlaterally away from the face of the knife and another portion of themovement of the support will shift the sharpener laterally toward theface of the knife.

20. In a device of the class described, the combination of a pivotallymounted support, a grinder rotatably supported thereby and movablelaterally toward and away from the face of the knife, means for movingthe support about its pivot, and a cam device operating to shift thegrinder laterally during the movement of the support.

21. In a device of the class described, the combination of a pivotallymounted support, a grinder rotatably supported thereby and movablelaterally toward and away from the face of the knife, means for movingthe support about its pivot, a cam device operating to shift the grinderlaterally/ 1 5' during the movements of the support, and

stops for limiting the movements of the support.

22. In a device of the class described, the combination of a pivotallymounted support, a grinder rotatably supported thereby and movablelaterally toward and away from the face of the knife, means for movingthe support about its pivot, and means for shifting the grinderlaterally during such movements of the support, the last said meansembodying a cam and a cooperating element relatively movable, one ofwhich is fixed and the other being connected and movable with thegrinder.

23. In a device of the class described, the combination of a pivotallymounted support, a grinder rotatably supported thereby and movablelaterally toward and away from the face of the knife, means for movingthe support about its pivot, and means for shifting the grinderlaterally during such movements of the support, the last said meansembodying a cam and a cooperating element relatively movable, one ofwhich is v ment of the support.

fixed and the other being connected and movable with the grinder andelastic means operating to hold the cam and element in en- 25. In adevice of the class described, the combination of a pivotally mountedsupport, a sharpener rotatably supported thereby andmovable laterallytoward and away from the face of the knife, means for moving the supportabout 1ts p1vot, sa1d means embodying a cam and cooperating elementrelatively movable, and means for shifting the sharpener laterallyduring such movement of the support, the last said means embodying a camand cooperating element rel-- vatively movable.

26. In a device of the class described, the combination of a pivotallymounted support, a sharpener rotatably supported thereby and movablelaterally toward and away' from the face of the knife, means for movingthe support about its pivot, said means embodying a cam and cooperatingelement relatively movable, and means for shifting the sharpenerlaterally during such movement of the support, and yielding means forholding said cam and element in engagement.

v 27. In a device of the class described, the combination of a pivotallymounted support, a sharpener rotatably supported thereby and movablelaterally toward and away from the face of the knife, means for movingthe support about its pivot, said means embodying a cam and cooperatingelement relatively movable, and means for shifting the sharpenerlaterally during such movement of the support, the last said meansembodying a cam and cooperating element relatively movable and yieldingmeans for holding them in engagement.

' 28. In a device of the class described, the combination of. apivotally mounted sup-f vport, means tendi normally to move thesu'pportin one direction about its pivot, means for moving the supportabout its pivot in the opposite direction and embodying a cam devicehavinga shiftable element, stops for limiting the movement of the'shiftable element, a grinder carried 'by the support and means wherebythe move ment of the support about its pivot will shift the grinderlaterally.

- 29; In a device of the class'described, the

combination of a pivotally mounted support,

ment, stopsfor limiting the movementof I the shiftable element, agrinder carried by the support, and means whereby the movement of thesupport about its pivot will shift the grinder laterally.

30. In a device of the class described, the combination of a-pivotallymounted support,

'means tending normally to move the support in one direction about itspivot, means for moving the support about its pivot in the oppositedirection and embodying a cam device having a shiftable element, stopsfor limiting the movement of the shiftable element, a grinder carried bythe support, and

means whereby the movement of the support about its pivot will shift thegrinder-haterally, said cam device also operating to hold the support ineach of its adjusted positions.

31. In a device of the class described, the combination of a pivotallymounted support, means tending normally to move the support in onedirection about its pivot, means for moving the support about its pivotin the opposite direction and embodying a cam device having a shiftableelement, a grinder for one face of the knife carried by the support andmovable across the edge,

of the knife by the movement of the support, meanswhereby such movementof the support about its pivot will shift the grinder laterally, agrinder for the other face of the knife, and means individual to thelast said grinder for controlling it.

32. In a device of the class described, the combination of a pivotally.mounted support, means tending normally to move the 'su ort in onedirection about its ivot PP P a means for moving the support about itspivot in the-opposite direction and embodying a cam device having ashiftable element, a grinder for one face of the knife carried by thesupport and movable across the edge of the knife by the movement of thesupport, cam means whereby such movement of the support about its pivotwill shift the grinder laterally, a grinder for the other face of theknife, and means individual 'to the last said grinder for controllingit. p

' 33. In a device for sharpening the knife of a slicing machine, thecombination with a support having an upright cam-shaped side, of acasing pivotally mounted in said support having a slotted openingadjacent said upright side, a spindle rotatable in the casing having apin protruding through said opening and adapted to engage the saidcam-shaped side, a grinder mounted on said spindle, and a lever pivotedon saidsupport adapted to engage said casing and to rotate it about itspivot, the said pin engaging the two subscribing Witnesses, on thistenth day cam-shaped side during the movement of of July A. D. 1912.

the casin to cause the grinder to be moved outwardlg from the casingduring a portion WILHELM-US VAN B 5 of the pivotal movement of thecasing. Witnesses:

In'testimony whereof I have signed my JAN J. .CRANSTENAEL,

name to this specification, in the presence of PIETER C. DE GROOT.

